某学校生物兴趣小组开展了三体综合征患儿的�病率与母亲年龄的关系如图所示预防该遗传病的主要措施是 �适龄生育 �基因诊断 �染色体分析 Template




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tomski某学校生物兴趣小组开展了三体综合征患儿的�病率与母亲年龄的关系如图所示预防该遗传病的主要措施是 �适龄生育 �基因诊断 coloring